[Bug 88481] New: Kernel oops leaves system without graphical output [radeon]

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=88481

            Bug ID: 88481
           Summary: Kernel oops leaves system without graphical output
                    [radeon]
           Product: Drivers
           Version: 2.5
    Kernel Version: v3.17.3
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: daniel.otero at outlook.com
        Regression: No

Created attachment 158101
  --> https://bugzilla.kernel.org/attachment.cgi?id=158101&action=edit
dmesg output

When trying to start the X server through the the login manager, the radeon
module seems to crash leaving the system without graphical output (but
otherwise working). This happens every time as soon as PC boots.

Going back to v3.17.2 fixes the issue.

This seems to be relevant dmesg part:

[    2.640374] BUG: unable to handle kernel paging request at ffffec2000000900
[    2.640419] IP: [<ffffffff811ac4e6>] kfree+0x56/0x1a0
[    2.640449] PGD 0 
[    2.640462] Oops: 0000 [#1] PREEMPT SMP 
[    2.640488] Modules linked in: [...]
[    2.641120] CPU: 0 PID: 287 Comm: Xorg.bin Not tainted 3.17.3-1-ARCH #1
[    2.641152] Hardware name: Gigabyte Technology Co., Ltd. To be filled by
O.E.M./Q77M-D2H, BIOS F2 12/20/2012
[    2.641197] task: ffff8800dc131420 ti: ffff8800dc168000 task.ti:
ffff8800dc168000
[    2.641232] RIP: 0010:[<ffffffff811ac4e6>]  [<ffffffff811ac4e6>]
kfree+0x56/0x1a0
[    2.641269] RSP: 0018:ffff8800dc16ba30  EFLAGS: 00010286
[    2.641294] RAX: 0000022000000900 RBX: 0000100000024414 RCX:
0000000000010005
[    2.641328] RDX: 000077ff80000000 RSI: 0000000000000005 RDI:
0000100000024414
[    2.641361] RBP: ffff8800dc16ba48 R08: 0000000000000005 R09:
ffffec2000000900
[    2.641393] R10: 0000000000000010 R11: 0000000000000000 R12:
ffff8800dd430800
[    2.641426] R13: ffffffffa0736e8c R14: 00000000000120f0 R15:
0000000000001800
[    2.641460] FS:  00007f3efe93e8c0(0000) GS:ffff88021dc00000(0000)
knlGS:0000000000000000
[    2.641497] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.641524] CR2: ffffec2000000900 CR3: 000000020e2e2000 CR4:
00000000001407f0
[    2.641556] Stack:
[    2.641567]  ffff8800dd9d4000 ffff8800dd430800 ffff8800dd9d4000
ffff8800dc16bb30
[    2.641607]  ffffffffa0736e8c 000000000000004c 000120480001212c
ffff880000000008
[    2.641648]  0000ffff00012044 000000000001212c 0000000000012048
0000000000012044
[    2.641688] Call Trace:
[    2.641721]  [<ffffffffa0736e8c>] evergreen_hdmi_setmode+0xd8c/0x1970
[radeon]
[    2.641763]  [<ffffffffa034c8d4>] ? drm_detect_hdmi_monitor+0x74/0xc0 [drm]
[    2.641810]  [<ffffffffa073f388>] radeon_atom_encoder_mode_set+0x178/0x3c0
[radeon]
[    2.641849]  [<ffffffffa04a7986>] drm_crtc_helper_set_mode+0x356/0x530
[drm_kms_helper]
[    2.641897]  [<ffffffffa06d989c>]
radeon_property_change_mode.isra.1+0x3c/0x40 [radeon]
[    2.641943]  [<ffffffffa06d9a4e>] radeon_connector_set_property+0x1ae/0x3f0
[radeon]
[    2.641986]  [<ffffffffa03494e2>]
drm_mode_obj_set_property_ioctl+0x1b2/0x3a0 [drm]
[    2.642027]  [<ffffffffa034970f>]
drm_mode_connector_property_set_ioctl+0x3f/0x60 [drm]
[    2.642069]  [<ffffffffa0339fef>] drm_ioctl+0x1df/0x680 [drm]
[    2.642100]  [<ffffffff8105e9ac>] ? __do_page_fault+0x2ec/0x600
[    2.642134]  [<ffffffffa06b204c>] radeon_drm_ioctl+0x4c/0x80 [radeon]
[    2.642166]  [<ffffffff811da3c0>] do_vfs_ioctl+0x2d0/0x4b0
[    2.642194]  [<ffffffff811c9f31>] ? __sb_end_write+0x31/0x60
[    2.642222]  [<ffffffff811da621>] SyS_ioctl+0x81/0xa0
[    2.642249]  [<ffffffff8153d8e9>] system_call_fastpath+0x16/0x1b
[    2.642277] Code: 00 00 00 80 ff 77 00 00 49 b9 00 00 00 00 00 ea ff ff 48
01 d8 48 0f 42 15 38 bb 66 00 48 01 d0 48 c1 e8 0c 48 c1 e0 06 49 01 c1 <49> 8b
01 f6 c4 80 0f 85 0e 01 00 00 49 8b 01 a8 80 0f 84 83 00 
[    2.644387] RIP  [<ffffffff811ac4e6>] kfree+0x56/0x1a0
[    2.646397]  RSP <ffff8800dc16ba30>
[    2.648359] CR2: ffffec2000000900

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